voice/seeds: track seed files, add russian time parser, guard replySystem

five fixes spotted during routing investigation:

- gitignore: replace blanket models/ ignore with per-dir exceptions
  (/models/embedder/, /models/stt/, /models/tts/) so the seed text
  files under models/seeds/ are tracked in version control
- query.txt: fix merged line — 'сколько стоит свет в этом месяце' and
  'найди заметку про сервер' were fused with no separator
- reminder.txt: add 11 pure-verb reminder seeds without time expressions
  to shift centroid toward the reminding intent rather than time-lexicon
- StubDateTimeParser: add Russian 'через <N> <unit>'/'через час'/'через
  полчаса', 'сегодня'/'завтра'/'послезавтра' with optional clock, and
  'в <clock>' scan. Add Russian word numbers (один-десять) and unit
  inflections (час/часа/часов, минута/минуты/минут, день/дня/дней,
  неделя/недели/недель). Also adds missing English day/week units.
- replySystem: guard time branch against duration queries ('сколько
  времени прошло') reaching it via the classifier path after the
  stage-0 grammar's build filter rejects them. Mirrors stage0.go
  duration keywords.

cmd/mavend/voice.go

@@ -712,6 +712,13 @@ func (h *reactiveHandler) replySystem(ctx context.Context, dec router.Decision)
 	u := strings.ToLower(dec.Utterance)
 	now := h.now()
 
+	// stage-0 grammars catch the exact time/date patterns, but duration
+	// queries ("сколько времени прошло") bypass the grammar's build filter
+	// and can reach replySystem via the classifier path. Guard against them.
+	if hasDurationWords(u) {
+		return "пока не умею отвечать на этот вопрос."
+	}
+
 	switch {
 	case strings.Contains(u, "час") || strings.Contains(u, "врем"):
 		h := now.Hour()
@@ -735,6 +742,29 @@ func (h *reactiveHandler) replySystem(ctx context.Context, dec router.Decision)
 	}
 }
 
+// hasDurationWords checks whether u is asking about elapsed/remaining time
+// rather than the current clock — guards replySystem from replying "сейчас
+// X часов" to "сколько времени прошло". Mirrors the stage0.go build filter.
+func hasDurationWords(u string) bool {
+	s := strings.ToLower(strings.TrimSpace(u))
+	// First-word duration markers (same keywords as timeQueryBuild in stage0).
+	first := strings.Fields(s)
+	if len(first) > 0 {
+		switch first[0] {
+		case "прошло", "осталось", "пройдет", "минуло", "проходит":
+			return true
+		}
+	}
+	// Broader duration keywords appearing anywhere in the utterance.
+	if strings.Contains(s, "прошло") || strings.Contains(s, "осталось") {
+		return true
+	}
+	if strings.Contains(s, " до ") {
+		return true
+	}
+	return false
+}
+
 // reply wraps a text reply through TTS to produce a PushToTalkResp. If TTS
 // fails, the response carries an empty audio + the text — the client can
 // still display text if it can't play. The routedChannels field is